الفهرس | Only 14 pages are availabe for public view |
Abstract The current study aimed at inventory and assessment of land resources of Qena and El-Qarn Wadis in the Eastern Desert and detection and map the status of land use-land cover changes in the study area for agricultural utilization using remote sensing and GIS techniques, thereby to contribute to effective land use planning. The investigated area is bounded by longitudes 32°42’ and 33° 00’ east and latitudes 25° 53’ and 26° 22’north. To achieve the aim of this study, Landsat TM images dated at 1984, 2000 and ETM+ image dated at 2015 were treated and improved by using some Remote Sensing and GIS programs. Satellite image interpretations were conducted through digital image processing (unsupervised classification, data fusion and change detection), visual techniques (by draping satellite image on the SRTM to establish 3-d visualization), Normalized Difference Vegetation Index (NDVI) and Principal Component analysis (PCA) using ENVI 5.1 software to produce physiographic and land use/cover maps. Through these images, an explanatory map could be achieved. The map then checked in the field by the testing augers for boundary accuracy between the different mapping units. Field studies and ground truth were carried out to identify the physiographic units and to examine the reality of the interpretation. A total of 62 auguring holes and mini pits were taken to check the accuracy of mapping units. Twenty soil profiles were taken from the different physiographic units. Representative 44 soil samples have been collected from the soil profiles and analyzed for physical and chemical characteristics using the standard analytical methods. |